Create an indextype.
  
  Syntax:
   CREATE INDEXTYPE [schema.]indextype 
      FOR [schema.]operator(parameter_type,…)
         USING [schema.]implementation_type
Related Oracle Commands:
INDEX - CREATE INDEX
INDEXTYPE - DROP INDEXTYPE
 DBA_INDEXTYPES          ALL_INDEXTYPES           USER_INDEXTYPES 
 
 DBA_INDEXTYPE_OPERATORS ALL_INDEXTYPE_OPERATORS  USER_INDEXTYPE_OPERATORS
Equivalent SQL Server command: CREATE PARTITION SCHEME